Understanding acid reflux acid reflux happens when the contents of the stomach back up into the esophagus the esophagus is the tube that carries food from the throat to the stomach at the. Symptoms of acid reflux flare up in babies. Most babies spit up sometimes, even several times a day but when vomiting causes other problems or comes with other symptoms, it may be due to acid reflux, also called gastroesophageal reflux.
symptoms of acid reflux flare up in babies